The text book answer is 1709. This is probably due to the writer Scipione Maffei who wrote an article about the pianoforte in 1709 by then Christofori had produced four pianos. 1700 is the correct date.

Q.

What is the full name of the piano

A.

Gravicembalo col piano e forte (harpsichords with soft and loud.) it was shortened to "piano-forte" then aground 1900 shortened again to "piano".

Q.

Who invented the piano

A.

Bartolomeo Christofori (1655-1732)

Q.

How much does a piano weigh

A.

All depend on size and type

Baby grand 4' 11" approximately 240kg

Concert grand 9' approximately 490kg

Small upright 3' 8" approximately 184kgs

Large upright 4' 2" approximately 215kgs

Q.

What is the biggest piano ever made

A.

11' 8" long made by Challen England in 1935 for the Silver Jubilee of George and Mary. It weighed one and a quarter tons, and the combined tensile stress of the strings amounts to over 30 tons. The iron frame alone weighs six and a half hundred weight and the largest bass string is 9ft 11 inches